The Drake MN-75 matching network operates from 1.8 to 30 MHz. The range switch may be selected to: 1.8-3, 3-5, 5-7, 7-10, 10-14, 14-18, 18-23, 23-26 and 26-30 MHz. Inpute impedance is 50 ohms. Power capacity is 200 watts average continuous duty. The wattmeter accuracy is ± 5% of reading, ± 1% of full scale. The rear panel has four SO-239 jacks (one for input and three for output), three screw terminal connections and a ground post.